Table des Matières
Publicité
IST-2293.PM02.01/B
quella richiesta. Interrompere l'operazione, spegnere lo strumento e ripetere la Calibrazione). Chiudere la bombola
e togliere il TC011. A questo punto si possono verificare due casi:
LED giallo e verde accesi: la calibrazione è corretta, dopo 8 secondi l'apparecchio si riavvia automaticamente in
funzionamento normale (vedi capitolo FUNZIONAMENTO " Preriscaldo").
LED giallo acceso: la calibrazione è fallita dopo 8 secondi l'apparecchio si riavvia automaticamente e dopo il pre-
riscaldo, ripetere la "Calibrazione" senza reinserire il "Codice". Se la condizione persiste anche dopo la sostituzione del-
la "Cartuccia Sensore", inviare il rilevatore al fornitore per la riparazione.
"VERIFICA"(Non serve Codice): serve per controllare, utilizzando la miscela di gas sopra indicata, la corretta rispo-
sta al gas e può essere eseguita dopo la "Calibrazione" o dopo l'installazione, ma va eseguita soprattutto durante le
manutenzioni periodiche, in quanto è l'unico metodo per controllare l'effettivo funzionamento del rilevatore.
Infilare il TC011 sul portasensore, regolare il riduttore della bombola in modo che il flussometro indichi circa 0,3
l/min
(vedi
Fig.3). Controllare, che con i puntali del volmetro sui Test-Point "TESTmA",
in mV indicato in
Tabella 3-Colonna 6".
le, cui è collegato il rilevatore, indichi il valore in %LIE (± 2) indicato in
zione". Terminata la "Verifica", chiudere la bombola e togliere il TC011. L'uscita, tornerà poi a 4 mA.
Se si usa la specifica miscela Gas/Aria del gas da rilevare, il segnale d'uscita dovrà corrispondere al gas utilizzato.
(Esempio se si deve verificare un rilevatore tarato per Idrogeno, utilizzando una bombola con H
(=20%LIE) in Aria, l'uscita in mA dovrà essere circa 7,2 mA (ovvero circa 72 mV su "TESTmA").
GB
DESCRIPTION
The TS293P series is a gas detector able to detect combustible gases by employing a Pellistor sensor calibrated up
to 100% LEL to different gases and find their best application in centralized alarm systems for laboratories, manu-
facturing industries and environments to be protected from possible leakage of gas.
The instruments is flameproof certified and comprise of an enclosure in which the electronic circuit and the termi-
nals are mounted and a downward facing cylindrical sensor housing with inside a replaceable "Cartridge Sensor".
The instrument has a 4÷20mA linear output (S) with 100%LEL (Lower Explosive Limit) F.S. of detected gas. This output
is connectable to a remote Gas Central Unit as listed in
for Test and Calibration routine protected by a code and 3 LED shows the working conditions:
Red LED "ALARM":
Green LED "ON":
Yellow LED "FAULT":
NOTES ON THE AVAILABLE MODELS
The above Gas value is on compliance with EN61779-1.
TS293PM (Methane CH
LEL (Lower Explosive Limit) is 4.4% volume.
TS293PG (GPL) is calibrated to detect LPG, a gas heavier than air and consists of a mixture of 20÷30% Propane
(C
H
) and 80÷70% Butane (C
3
8
ume for Propane and 1.4% volume for Butane. Standard calibration to LPG is carried out for Butane gas.
TS293PI (Hydrogen H
the lightest gas. Its density as to air is 0.07 and its LEL (Lower Explosive Limit) is 4% volume.
TS293PB (Unleaded Gasoline/Petrol) is calibrated to detect Gasoline vapours heavier than air and highly flam-
mable. Its density as to air about 2.8 and its LEL (Lower Explosive Limit) is about 1.2% volume.
TS293PX can be calibrated to detect the gases listed in
gases not listed in this table are present in the environment we suggest to use the model TS293PX-H.
OPERATIONAL DESCRIPTION
The catalytic Pellistor sensor is practically insensitive to humidity and temperature variations. The calibration is car-
ried out for the specific gas to be detected. Anyway, it can contemporaneously detect any other flammable gas that
should be present in the same environment.
Note that the LEDs are not visible when the enclosure is closed.
Preheating: when powered, the sensor needs a time of preliminary heating of about 60 seconds. During this period
the yellow LED "FAULT" flashes. After this period, the yellow LED light off, the green LED "ON" illuminates to indicate
normal functioning. After this period the unit is able to detect gas even if it attains the optimum stability conditions
after about 4 hours continual functioning.
Normal operation: the green LED "ON" should be light on.
Alarm: when Gas concentration attains 20% LEL the red LED "ALARM" illuminates (only if it be activate by Dip-Switch).
Faults: the Yellow LED illuminates and the "S" output falls down to 0mA. (The different faults are listed below).
Yellow LED illuminates each 4 seconds (with green LED activate): this happens when the "Cartridge Sensor" has
overcome its period of life (about 5 years) and its correct operation is not longer guaranteed. The detector keeps on
operating normally but it is necessary to replace, as soon as possible, the "Cartridge Sensor" with a new one. The type to
be required is listed in
Table 3 (2nd
Yellow LED activate, green LED off (0mA output signal): this signal different kind of faults. 1) The Dip Switch set
up is wrong, please verify
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
[ovvero che l'uscita in mA aumenti fino al valore indicato nella
20% LEL alarm indication.
normal working condition
the sensor should be faulty, disconnected, out of scale or expired.
) is calibrated to detect Methane, a gas lighter than air. Its density as to air is 0.55 and its
4
H
). Propane density as to air is 1.56 while Butane' is 2.05. The LEL is 1.7% vol-
4
10
) is calibrated to detect Hydrogen, is a colourless, odourless, highly flammable gas and is
2
column). The replacement procedure is described in the attached manual.
(see Table
2). 2) The "Cartridge Sensor" is not working, please replace with new one. 3) If a
Colonna
8]. Se il valore fosse diverso, eseguire la "Calibra-
Table
1. On the Printed Circuit Board, F1 and F2 key using
Table
3, it is used in low polluted environments. If other
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Pag.4/10
(vedi
Fig.2) si raggiunga il valore
Colonna 7
(±0,2mA) e la centra-
a 0,8%volume
2
Publicité
Table des Matières
